Jump to content

Server Lease Renewal/Software Licenses

Our yearly server lease, software licenses, as well as hardware operating costs, ARE due Dec 6th, 2021. Our current donations have fallen far short of the funds we need to renew. Please remember the RennTech.org community is Member supported so please consider a donation to help...  THANK YOU!

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

Slow Coolant Leak


Recommended Posts

I have a 2000 996 with 34K miles that has an occasional leak from what appears to be the reservoir cap. I can see crust around the bottom of the cap and around the screw lip on the reservoir (see photo). The coolant appears to be dripping down the overflow hose and onto the driver's side muffler and onto the ground. I have topped off the reservoir and the temperature gauge reads 180 degrees when warm. Is this common?

post-17941-1175111798_thumb.jpg

Link to comment
Share on other sites

  • Moderators

I'd like to add one more thing about these overflow reservoir caps, including the .01 rev. If the cap threads and top seal are not lubricated, then the cap will not fully seat, and can cause a leaky cap. The cap should seat with 2 of the "cross ends" 90 degrees to the ground. With an un-lubricated cap, the cap will bind with about an 1/8th to a 1/16th of the way to go, this is enough to let the cap seep or weep out coolant. It is not a whole lot, but is more than what should come out (none!)

I use some spray silicone spray lightly on the cap threads, and on the rubber gasket on the bottom of the inside of the cap. With the silicone on the cap, when the cap is almost fully closed, you will feel the effort to turn the cap increase, then it sorta snaps into the last bit.

My 02 996 has an .01 cap, and it was still weeping out a little coolant.

When I looked at the cap I saw it was off just a bit. So I took off the cap, cleaned off all of the escaped coolant residue and then sprayed on some silicone spray. After that, the cap clicked into place. No leakage so far, so I hope I fixed the root problem.

Link to comment
Share on other sites

I was having a coolant leak with my 2001 996 C4 on the driver's side exhaust tip. I had a '00' part number cap and replaced it with the '01' part number cap. I went for a drive and parked the pcar in the garage. I just went out to get the mail through the garage and noticed I still have a coolant link. The leak does not appear to becoming from the overflow hose coming out of where the cap is located. I had the coolant system pressure checked today when I got the oil changed and it was fine. Any ideas on what is going on?

:renntech:

Link to comment
Share on other sites

Most common cause is the coolant tank is cracked.

I started out with a leaking cap and about a month after I put on the new cap, the coolant tank let go. The coolant tanks are renouned for cracking...but it's really hard to see the crack sometimes....the better pressure retention from the new cap can cause the older coolant tanks to finally let go. I haven't had any more problems since I replaced both.

Link to comment
Share on other sites

Most common cause is the coolant tank is cracked.

Yes! I had this problem yesterday, I parked up in my parking spot and noticed coolant dripping on the near side rear of the car, took the bottle out, a tiny hairline crack, as a temporary fix we applied some epoxy (stuff used with fiberglass), seems to have done the job for the moment.

Will order a new tank on Tuesday, not to hard to change over..

Link to comment
Share on other sites

  • 3 weeks later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.